Christmas tree



FIG. 1 is a perspective view of a christmas tree showing our new design;

FIG. 2 is an elevational view thereof, on a reduced scale;

FIG. 3 is an elevational view thereof, rotated approximately 45° to the left about a vertical axis as compared to FIG. 2;

FIG. 4 is an elevational view thereof, rotated approximately 45° to the right about a vertical axis as compared to FIG. 2;

FIG. 5 is a bottom plan view of FIG. 3;

FIG. 6 is a top plan of FIG. 3;

FIG. 7 is a side elevational view of one element of FIG. 3, shown separately for clarity of illustration;

FIG. 8 is a side elevational view of another elements of FIG. 3, shown separately for clarity of illustration; and,

FIG. 9 is an exploded perspective view of FIG. 3. 

The ornamental design for a christmas tree, as shown and described. 